基于扩频体制的短波时号发播新方案及可行性分析  

A Novel Transmission Scheme of HF Time Signals based on Spread Spectrum System and its Feasibility Analysis

作　　者：袁江斌[1] 李实锋[1] 闫温合 杨朝中[1] 胡召鹏[1] YUAN Jiang-bin;LI Shi-feng;YAN Wen-he;YANG Chao-zhong;HU Zhao-peng(National Time Service Center,Chinese Academy of Sciences,Key Laboratory of Precision Navigation and Timing Technology,Xi'an 710600,China;University of Chinese Academy of Sciences,Beijing 100049,China)

机构地区：[1]中国科学院国家授时中心,精密导航定位与定时技术重点实验室,陕西西安710600 [2]中国科学院大学,北京100049

出　　处：《宇航计测技术》2019年第5期38-43,共6页Journal of Astronautic Metrology and Measurement

基　　金：中国科学院“西部之光”人才培养项目(XAB2018B21);广西精密导航技术与应用重点实验室项目(DH201814)资助

摘　　要：短波授时系统采用扩频信号将有助于提高其授时服务质量。顾及到短波信道的复杂性和系统带宽的有限性,本文提出了一种基于两个扩频信号之间的相对发播时间间隔实现短波时号发播的新方案,并对其可行性进行了分析。阐述了所提方案的基本技术思路,并通过理论分析与比较,验证了所提方案相比于常规方案能够显著降低接收机的时号检测错误概率,可更好地实现协调世界时UTC和世界时UT1两种短波时号的兼容发播,为基于扩频体制的短波时号调制技术的进一步研究提供一种有效途径。The application of spread spectrum signal in HF time service system will help to improve the quality of time service. Considering the complexity of HF channel and the limitation of system bandwidth,this paper proposes a novel scheme to transmit HF time signal based on the relative time interval between two spread spectrum signals,and analyses its feasibility. The basic technical ideas of the scheme is expounded,and then theoretical analysis is carried out to verify that compared with the conventional scheme,the proposed scheme can significantly reduce the probability of the time signal detection error of the receiver. Compared with the conventional scheme,the proposed scheme is better realized to coordinate the compatible transmission of the two HF time signals of UTC and UT1,and provide an effective way for the further research of HF time signal modulation technology based on spread spectrum system.

关 键 词：短波授时 短波时号 扩频 相对时间间隔 

分 类 号：TN911.3[电子电信—通信与信息系统]